Ok, thanks … so, as I guessed, your first message did not contain the actual 
error message, which is …

    Subscript indices must either be real positive integers or logicals.

It is always a good idea when working with a problematic case file to run it 
through case_info() 
<http://www.pserc.cornell.edu//matpower/docs/ref/matpower5.1/case_info.html>. 
In this case, it clearly identifies the issue for you …

>> case_info('case95')
Unknown branch "from" buses:  1
       branch(67, F_BUS) = 65
Unknown branch "to" buses:    1
       branch(66, T_BUS) = 65
Checking connectivity ... 2 connected groups, 0 isolated buses
...

Bus 65 is missing from the bus matrix, but there are branches claiming to 
connect to it.

Best,

    Ray



> On Apr 28, 2015, at 10:50 AM, Hiranya Seneviratne 
> <[email protected]> wrote:
> 
> Hi,
> 
> Yes that is the error i got on the command window when I tried to run a power 
> flow on a 95 bus system.
> This is the result on the command window. 
> I have attached the data for the 95 bus system that I am trying to run the 
> power flow on. If you can please let me know how I can resolve this error.
> Thank you
> <case95.m>
> 
> loadcase('case95')
> 
> ans = 
> 
>     version: '2'
>     baseMVA: 100
>         bus: [94x13 double]
>         gen: [2x10 double]
>      branch: [94x11 double]
> 
> >> runpf('case95')
> Subscript indices must either be real positive integers or
> logicals.
> 
> Error in ext2int (line 168)
>             brs = ( mpc.branch(:, BR_STATUS) & ...  %% branch
>             status
> 
> Error in runpf (line 130)
> mpc = ext2int(mpc);
>  
> 
> 
> 
> On 28 Apr 2015, at 15:10, Ray Zimmerman <[email protected] 
> <mailto:[email protected]>> wrote:
> 
>> Is that the complete error message? I don’t see where it says what the error 
>> was, only where it happened. Is there a simple way I could recreate the 
>> error?
>> 
>>    Ray
>> 
>>> On Apr 26, 2015, at 4:44 PM, Hiranya Seneviratne 
>>> <[email protected] <mailto:[email protected]>> 
>>> wrote:
>>> 
>>> 
>>> Hi,
>>> Can you please let me know what this error means.
>>> 
>>> Error in ext2int (line 168)
>>>           brs = ( mpc.branch(:, BR_STATUS) & ...  %% branch
>>>           status
>>> 
>>> Error in runpf (line 130)
>>> mpc = ext2int(mpc);
>>> 
>>> 
>>> Thank you
>>> 
>>> 
>> 
>> 
>> 
> 

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